CN111337281A

CN111337281A - Method for heavy-load test of semi-submersible type hoisting and disassembling platform

Info

Publication number: CN111337281A
Application number: CN202010158466.XA
Authority: CN
Inventors: 曹雨华; 王宏民
Original assignee: China Merchants Heavy Industry Jiangsu Co Ltd
Current assignee: China Merchants Heavy Industry Jiangsu Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-06-26

Abstract

The invention discloses a method for a heavy-load test of a semi-submersible type hoisting and dismantling platform, which comprises the following steps: (1) placing the empty test barge on the water surface, and floating to a designated test position of a wharf; (2) according to the rope distribution indication, carrying out rigging configuration on a test barge, and placing the rigging; (3) the bending arm is heavily hung, and the steel wire rope ring on the test barge is hung on the hook head of the heavy hanging hook; (4) lifting an empty test barge, adjusting a heavy-lift arm support, and keeping a certain distance between the test barge and a wharf surface; (5) symmetrically adding water into a test barge bow-stern cabin until the test barge weight meets the test requirement; (6) slowly hoisting the test barge to a position above the platform deck surface and stopping hoisting; (7) rotating the arm support according to the test program, adjusting the load of the platform in steps, and recording data; (8) the test barge is put to the upper part of the wharf surface, and water in a cabin of the test barge is pumped out; (9) and (5) placing the empty test cube on the water surface, continuously lowering the heavy-duty hook head, unhooking, and ending the test.

Description

Method for heavy-load test of semi-submersible type hoisting and disassembling platform

Technical Field

The invention belongs to the technical field of ocean engineering, and particularly relates to a method for a heavy-load test of a semi-submersible hoisting and dismantling platform.

Background

With the low ebb of international oil prices and the improvement of requirements on marine environment, the number of decommissioning projects of offshore oil and gas facilities is greatly increased, and the dismantling market of old and idle platforms is more active. The comprehensive competitiveness of the semi-submersible type hoisting and dismantling platform for offshore operation is obviously superior to the combination of other existing hoisting ships and living platforms. In the aspects of positioning, operation, life support functions and the like, the semi-submersible type hoisting and disassembling platform improves the hoisting load compared with a traditional hoisting ship, and the heavy crane is key equipment for realizing the functions. In the construction process of the semi-submersible type hoisting and dismantling platform, the load test of the heavy crane is very critical, the hoisting capacity of the platform under different working conditions can be determined, and the safety of the whole platform is concerned. At present, a semi-submersible type hoisting and disassembling platform heavy hoisting load test is carried out on the sea, the test risk is very large, and the cost is high.

Disclosure of Invention

In order to solve the technical problems, the invention provides a method for a heavy-duty load test of a semi-submersible type hoisting and dismantling platform, which has the advantages of small test risk, low cost and high efficiency. Compared with a load test under a complex working condition at sea, the test method is carried out at the wharf, the risk is lower, in addition, the test method lifts the aerial barge in water, then the wharf is emptied and added with water, and the overload risk of the wharf is reduced. The test is completed by utilizing self-owned resources, and the cost is well controlled.

The invention adopts the following technical scheme:

a method for a heavy-load test of a semi-submersible type hoisting and dismantling platform comprises the following steps:

(1) placing the empty test barge on the water surface, and floating to a designated test position of a wharf;

(2) according to the rope distribution indication, carrying out rigging configuration on a test barge, and placing the rigging;

(3) the semi-submersible type hoisting and disassembling platform is used for hanging a bending arm to 45-47 degrees, and 4 steel wire rope loops of 450t on the test barge are hung on a heavy hanging hook head;

(4) lifting an empty test barge, adjusting a heavy hoisting arm frame to 75-78 degrees, and keeping the test barge about 300-500 mm away from a wharf surface;

(5) symmetrically adding water to bow and stern cabins of the test square barge by using a wharf pipe network according to the calculated water adding amount of each cabin until the weight of the test square barge meets the test requirement, and symmetrically adding water to prevent the center of gravity from deviating;

(6) slowly hoisting the test barge to a position above the platform deck surface and stopping hoisting;

(7) the position is used as an initial position of a load test, the arm support is rotated according to a test program, the load of the platform is adjusted step by step, data are recorded, and finally the platform returns to the initial position;

(8) and (4) lowering the test barge to a position 300-500 mm above the wharf surface, and evacuating water in the test barge cabin through the side blind flange.

(9) And (3) hoisting and disassembling the platform to hoist the bending arm to 45-47 degrees, lowering the empty test barge onto the water surface, continuously lowering the heavy hoisting hook head, unhooking and ending the test.

The invention has the beneficial effects that: the platform heavy-load test is generally required to be carried out in a heavy draught state under the working condition of the sea. The heavy-duty hoisting test is carried out at the wharf, the wharf pipe network is used for adding water for the heavy-duty hoisting test, and water is quickly drained through the side blind flange, so that the risk is low, the cost is low, the efficiency and the safety of the test are greatly improved, and the economic benefit is considerable.

Drawings

FIG. 1 is a schematic diagram of the rope arrangement of the test method of the present invention.

FIG. 2 is a schematic diagram of the test method of the invention for hoisting the empty test barge on the water surface.

FIG. 3 is a schematic diagram of an empty test barge hanging to a quay surface according to the test method of the invention.

FIG. 4 is a schematic view of the test start position of the test method of the present invention.

In the figure, 1, a test barge, 2, a heavy lifting hook head, 3, a steel wire rope loop, 4, a heavy lifting, 5, a lying arm, 6, a wharf, 7, a shackle, 8, a double-cake pulley and 9, a connecting tool are arranged.

Detailed Description

As shown in fig. 1-4, a method for a semi-submersible crane dismantling platform heavy-load test is prepared as follows before the test: (1) the method is familiar with knowing and mastering the heavy-load test program file of the semi-submersible type hoisting and disassembling platform and the loading requirements of each test stage. (2) And calculating the water adding amount of each cabin meeting the test requirements according to a test shelter capacity table.

The specific test method comprises the following steps:

(1) placing the empty test barge 1 on the water surface, and floating to a designated test position of a wharf;

(2) as shown in fig. 1, rigging configuration is carried out on a test barge 1, and the rigging is placed and comprises a shackle 7 and a double-cake pulley 8; the double-cake pulley 8 is arranged below the connecting tool 9. The double-cake pulley 8 is connected with the wire rope loop 3 above the double-cake pulley through the shackle 7. The connecting tool 9 is connected with the wire rope ring 3 above the connecting tool through the shackle 7.

(3) As shown in fig. 2, the bending arm of the semi-submersible type hoisting and disassembling platform heavy crane 4 is 5 to 45-47 degrees, and 4 steel wire rope loops 3 of 450t on the test barge 1 are hung on a heavy crane hook head 2;

(4) as shown in fig. 3, the empty test barge 1 is lifted, the groveling arm 5 of the heavy crane 4 is adjusted to 75-78 degrees, and the plane of the test barge 1 away from the wharf 6 is kept about 300-500 mm;

(5) according to the calculated water adding amount of each cabin, symmetrically adding water to bow and stern cabins of the test square barge 1 by using a wharf pipe network until the weight of the test square barge 1 meets the test requirement, and symmetrically adding water to prevent the center of gravity from deviating;

(6) as shown in fig. 4, slowly lift the test barge 1 to a position above the deck surface of the platform and stop;

(8) and (3) lowering the test barge 1 to a position 300-500 mm above the wharf surface, and evacuating water in the cabin of the test barge 1 through the side blind flange.

(9) And (3) hoisting and disassembling the platform in a semi-submersible type manner, heavily hoisting and bending the arm 5 to 45-47 degrees, lowering the blank test barge 1 onto the water surface, continuously lowering the hook head 2 of the heavy crane, unhooking and ending the test.

By adopting the test method, the test efficiency and safety are effectively improved, and the economic benefit is considerable.

Claims

1. A method for a heavy-load test of a semi-submersible type hoisting and dismantling platform is characterized by comprising the following steps:

(1) placing the empty test barge on the water surface, and floating to a wharf test position;

(5) symmetrically adding water to bow and stern cabins of the test barge by using a wharf pipe network according to the calculated water adding amount of each cabin until the weight of the test barge meets the test requirement, and symmetrically adding water to prevent the center of gravity from deviating;

(6) connecting the heavy-hanging stable cargo hook with a test barge lifting lug, slowly lifting the test barge to a position above the platform deck surface, and stopping;

(8) the test barge is lowered to a position 300mm-500mm above the wharf surface, and water in a cabin of the test barge is pumped out through a side blind flange;